31. Sa and Pa are immovable ( once Sa is selected ), forming a just perfect fifth . 32. Brian Williams ( 1-0 ) pitched a perfect fifth for his first win of the season. 33. For example, the second movement opens on a perfect fifth sonority and gradually introduces more dissonant pitches. 34. In Pythagorean tuning all notes are tuned as a number of perfect fifths ( 701.96 cents ). 35. In particular they take the conventional flats, naturals and sharps as a Pythagorean series of perfect fifths . 36. A benefit of stretching octaves is the correction of dissonance that equal temperament imparts to the perfect fifth . 37. In Western tonal music, one also finds chord progressions between chords whose roots are related by perfect fifth . 38. Brown pitched a perfect fifth inning but told Tracy he couldn't pitch the sixth because of the pain. 39. Today, music for the horn is typically written in F and sounds a perfect fifth lower than written. 40. The difference between the perfect fourth and the perfect fifth is the " tone " or major second.